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Old 01-18-2018, 02:01 PM   #21
SSDiv6
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Default Re: New Stock Replacement Head Buyer Beware

They also require new valve cover gaskets with a very thin flange...
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Old 01-18-2018, 08:38 PM   #22
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Default Re: New Stock Replacement Head Buyer Beware

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Originally Posted by PJ305 View Post
Terry the problem is not one of the castings on the approved list is able to get down to the stock runner cc's legally "wink wink" ! I talked to a tech guy at RHS today and he told me they haven't casted their approved heads since 2011. That doesn't mean you can't find them but he said RHS is pretty much done with cast iron stuff!

I just wish NHRA would research something before they paint it with their broad brush!

Engine Quest bought most of the RHS cast iron line.
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Old 01-19-2018, 06:26 AM   #23
Larry Hill
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Default Re: New Stock Replacement Head Buyer Beware

They also require heavy new valves, no nail heads or wasted stems, and thick wall seats. Don't forget to sink the valves.
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